getting a bad hiss from my airline wireless

I bought a Samson Airline Wireless off of Jammadave last week and the hiss I'm getting from iit makes it unuseable. It'll work fine from two-three feet away, but when I walk into another room, half of my sound is an obnoxious hiss and it cuts out at times. I've tried everything I can, but I still can't get any clearer signal. Anyone got any tips? At this point, I'm considering taking it upto Guitar Center and trying to trade it in for the new Nady bass wireless. I've got a gig I was hoping to use this on, this weekend, but as of now, it looks like I'm going to have to use a cable.

Mine has no such trouble. I say check the power outlet. Also check that you're using the correct AC adapter. It runs off 12volts. I didn't realise this initially and tried to daisy chain it to 9v adapter that runs my other pedals. It didn't work too well until I realised my error and switched it to 12V. No troubles since.